Tire-valve



M. C. SCHWEINERT AND H. P. KRAFT.

TIRE. VALVE. APPLICATION FILED AUG-27, 19I5.

Patented Jan. 25,1921.

' TORS: a M i?-%, v By A'ztumeys,

iNVEN Mm QFFEQE;

AND HENRY P. KRAFT,

TI BE-VALVE Specification of Letters intent.

Petenteii 5 Appli ation filefl August 2?, 15315. Faerie"! Ho. 7,604.

To all woo in mail concern:

Be it known that we, llLiXIIiIILIAN CiIARLns Sonwnrrsnnr, of West i-loh'olren, in the county of Hudson end State of New Jersey end HENRY l5. KRAFT, of Riclgewood, in the connty of Bergen and State of New Jersey, both citizens of the Unitecl States of America, invented certain new and useful improvements in 'iire-Velves, of

following is o specification. is invention relates to improvements in valves of the used for inflating pneumetic tires. Specifically it is directed to an improved method of constructing the movable valve member of the welhknown Schrocler valve. in construction the valve proper, which is eel-opted to coact with a seat carried by or formed in the valve shell or casing, is mounted upon o pin or cerrier'the upgoer part of which pin extends to near the top of the valve shell for the purpose deflating, and the lower part of which extends through the loading spring end forms a carrier for the letter. Both r and. lower parts of the pin serve as maintain the valve in proper in tire valves or the like the and its pin ere necessarily ex- 'l, the total length being inch, end the diameter of ropc'r is in the herigidly joined im, o ehl with leek-tight iii difficulty has been encountered-l in in producing such a .connection iew the one roe cheepness of the small dimensions 0-2 the ports,

t of asses hling them in e conroerci l Acmrtling to the presentinvention e eonstroocion is ggroviclecl in which the cup anti join ereconheetecl with e leek-tight joint in hsiin oie end exgeditious manner, and at the some the connection is nestle permenent end rigicl so that the perts'cennot slip to the is an elevation greatly ensle a valve pro oer snrl en1- Fig. 2 is a view of the pin before the. veve cup is applied.

Fig. 3 is an elevation of \ith its seat and plug.

Referring to the drawings, let A indicate the velve proper,

the valve cup which is designed to carry a circular -packing B which" is aclepted to make contact with a suitable seat shown at S in 3, which is held in the valve shell by screw-threaded plug 1 The cup A is provided with a central bore A through which extends a pin 0. The pin is initially formed with a swagecl up portion l which serves when the parts are in position use holdin shoulder or flange to prevent the packing 5 from moving out of the cup (inn in P the act of onenin the valve;

t b 1 lieierring to 1* 1g. 2 which shows the shape of the Din before the valve cup is applied,

it will he not-sci that the upper portion (1/ of the pin above the shoulder D is of general cylindrical form and may be of any suitable diameter. Preferably the pin is formed from commercial wire and the diameter of the portion a will he that of the wire. Below the shoulder D is seating portion Zr tionel or jamming fit with the bore A of the cup A. The length of the portion '5 is somewhat greater than the len th of the o b Q cup, and below this portion is a portion 0 which is of such diameter as to make a fricof less diameter than the portion 7), the two diameters being preferably joined or connected by a tapered portion 03. The pin as shown in Fig. 2 is preferably, as before stated, forimcl from commercial WlIQ, anti its shape is given to it by swaging, rolling, or otherwise.

in asscmloling'the cup A is passed over the lower end of the pin and sli oed without material friction up to the portion 5 and forced on to the portion 1) until it reaches the position shown in Fig. 1. The tapered portion 0?. serves to guide the-cup .irom the smaller to the larger diameter."

, to form shoulders F, stich shoulders acting in. the completed structure as a stop to limit the downward movement of the valve proper.

By the construction just described the parts may be assembled without distortion, since the j amming of the cup in place on the stem does-not begin to take place until it approaches its final position. Const quently there is much less risk oi distortion of the parts. Furthermore, since the jamming action takes place only during a limited port'ion of the movement of the cup along the pin, the metal along the bore of the cup is not worn or distorted so as to impair the tightness of the joint formed with the portion 6. These consiuerations are of considerable importance in connection with a device which is of such small dimensions as the parts in question, particularly in view of the fact that the parts are made of brass which is relatively soft and pliable in its nature.

Furthermore, in the operation of assenrbling there is no danger of injury or defacement of the seat T for the washer B on the valve proper. In prior operations wherein the valve proper was contracted. by a longitudinal swaging operation by a tool engaging the seat, the latter was liable to become out of true or defaced so that a perfectly smooth and true seat was diificult to obtain. In the present invention there is nothing to distort the seat and a perfectly true bearing face for the washer is obtained so that the valve proper contacts evenly with the valve selit. lhis is important since it insures against leakage of the valve.

What we claim is:

l. A device of the character described comprising a valve proper, a pin extending through said valve proper, said pin having a driven leak tight engagement with said valve proper, an upset shoulder on said pin below said valve proper, and said pin having a portion of reduced diameter below said shoulder.

2. A. device of the character described comprising a valve proper, a pin extending through said valve proper, said pin having a driven leak tight engagement with said valve proper, an upset shoulder on said pin below said valve proper, and said pin having a portion of reduced diameter below said shoulder, and having a shoulder above said valve proper.

A device of the character described comprising a. valve proper having abore therethrough, a pin extending through said bore and having a portion contacting with the latter of substantially the same diameter as said bore, the parts being united by a driven fit, an upset portion beneath said valve proper, and a reduced portion beneath said upset portion.

4. A deviceof the character "described comprising a valve proper having a. bore, a pin extending through said bore, said pin having a portion of substantially the same diameter as said bore, the parts being united by a driven fit, a lower portion of smaller diameter, and an intermediate tapered portion, and said pin being upset immediately below said valve proper.

A device of the character described comprising a valve proper. a pin extending through said valve proper, said pin havin a leak-tight driven frictional Contact wit said valve proper and having a portion of reduceddiameter below said valve proper.

6. A device of the character described comprising a valve proper, a pin extending through said valve proper and a distance below the same. said pin having a shoulder above said valve proper and above the lower end of the pin, and said pin and valve proper having a driving fit whereby the valve proper is held in place by frictional contact.

7. The method of uniting a valve proper to a valve pin which consists in forming a hole through the valve proper and driving the latter on the pin.

8. The method of uniting a valve proper to a valve pin which consists in forming a hole through the valve proper, forming a pin with a portion of appropriate diameter to fit said holewith a driving fit, and a portion of less diameter between the first and the end of the pin, passing the valve proper over the portion of less diameter and driving it on the portion of greater diameter.

9. The method of uniting a valve proper to a valve pin which consists in forming a hole through the valve proper and driving the latter on the pin, and forming a shoulder on the pin below the valve proper.

10. The method of uniting a valve proper to a valve pin which consists in forming a hole through the valve proper, forming a pin with a portion of appropriate diameter to 115 fit said hole with a driving fit, and a portion of less diameter between the first and the end of the pin, passing the valve )roper over the portion of less diameter am driving it on the portion of greater diameter, and 120 forming a shoulder on the pin below the valve proper.

11. The method of uniting a valve proper to a valve pin which consists in forming a hole through the valve proper, forming a. 125

pin with a portion of appropriate diameter to fit said hole with a driving fit and a portion of less diameter between the first and the end of the pin, and a. taper between the two, passing the valve proper over the por- 130 tion of less diameter, and driving it on the signed our names in the presence of two subportion of greater diameter. scribing Witnesses.-

12. A device of the Ch;l1;1(2Ul' (iESCIibMi MAXIMUM CHARLES SCHWEINERT- comprising: a valve proper, and a pin extend- HENRY iQRAFT- 5 ing through said valve proper, the valve \Yitnesses:

proper fitting the pin with a, driving fit. (hues (hjxmcmmx,

In Witness whereof, we have hereunto Finn) WHITE. 

